length: 60 min
presenters: Jeremy Bartley, Kristian Ekenes
Mar. 11, 2020 10:30 a.m. - 11:30 a.m. Prerecorded and presented on YouTube.
Palm Springs Convention Center, Primrose B
Watch the video presentation.
This sample demonstrates how to filter features by attributes depending on the scale using a water pipes layer of Bangkok, Thailand containing more than 550,000 features. The approach involves filtering out pipes of a smaller diameter at small scales, and progressively displaying pipes with smaller diameters as the user zooms to large scales.
This sample demonstrates how to filter features by length depending on the view resolution using a water pipes layer of Bangkok, Thailand containing more than 550,000 features. The approach involves filtering out pipes shorter than the resolution of the view multiplied by a factor (e.g. lines shorter than 2 pixels, 3 pixels, etc.). This results in maps that look visually degraded, but is one approach for aggressively reducing your total download size.
This session describes the process for preparing the data used in the One Ocean app. The data started from 52 million points (4 GB) and resulted in 85,000 points with hundreds of attributes (280 MB).